Combined photoprinting and vignetting frame.



No. 699,739. Patented May l3, I902. w. ARMSTRONG & w. n. 0., CHAMBERS.COMBINED PHOTQPRINTING AND VIGNETTING FRAME.

7 (Application filed. July 15, 1901.)

(No Model.)

I u e I I m Wil iams. m 71137 5 "w re STATES PATET ()FFICEEQ \VILLIAMARMSTRONG AND IVILLIAM ROBERT OlVEN CHAMBERS, OF GATESI-IEAD, ENGLAND.

COMBINED PHOTOPRlNTlNG AND VlGNETTING FRAME.

SPECIFICATIUN formingpart of Letters Patent No. 699,739, dated May 1 3,1902. Application filed July 15,1961. Serial No. 68,435. (No model.)

T0 at whom, it may concern:

Be it known that we, WILLIAM ARMSTRONG, hair-dresser, residing at 157Askew road, and WILLIAM ROBERT OWEN CHAMBERS, joiner, residing at 13Alfred street, Gateshead, in the county of Durham, England, subjects ofthe King of Great Britain and Ireland, have invented certain new anduseful Improvements in Combined Photoprinting and Vignetting Frames, ofwhich the following is a specification.

The invention relates to photoprinting and vignetting frames; and itconsists principally in means for connecting the same together I anddetaching them from each other. The said means consists in providing thevignetting-frame with a metal lug or plate fixed to each side of thesame at right angles to its face and clamping the said frame to theprint ing-frame by means of a thumb-screw passing through a slot in eachlug and engaging with a screw-threaded hole on the side of theprinting-frame. Spring-clips are also provided for fixing thelight-diffuser in position, and a small pin or stop is fixed in eachhalf portion of the back of the printing-frame in such position that thelower edge of each of the spring fastening-arms bears against the samein their locked position and prevents any movement of the back ordisplacement of the printing-paper.

In order to fully describe the said invention, reference is made to theaccompanying drawings, in which- Figure 1 isa front face view of thevignetting-frame. Fig. 2 is a back view of the printing-frame fixed tothe vignetting-fraine, and Fig. 3 is a side view of the same.

a is the vignetting-frame, and b the printing-frame.

0 represents the lugs or plates fixed to the sides of the frame a, and drepresents the slots formed therein, through which pass the thumb-screwsc for fixing the two frames 'together.

The frame a is of larger size than the frame I) to admit of angularandlateral adjustment of the vignetting-card. \Vhen the two frames aresupplied or sold separately, the printingframes are provided with twowooden strips f, fixed one to each side of the same, to make up anydifference in width that may occur between the said frames, thethumb-screws engaging with screwed holes in the plates g, fixed to thestrips. I

The light-diffuser h is held in position by placing one end under twofixed clips or springs 2' and fixed by turning a single clip or springj(pivoted in a recess 7t at the top of the frame a) over the face of thesame, the said clips or springs being so formed as to admit and holdsecurely varying thicknesses of material that the diffusers may be madeof. By this means a great saving in time results in fixing and detachingthe light-diffuser.

The vignetting-frame may be made of either wood or of thin metal plateformed with beaded or thickened edges, thelugs being formed by turningover a strip formed on each side,

or they may be separately soldered or riveted thereto. The back Z of theprinting-plate is secured in the ordinary manner by the pivoted springsor arms m; but in order to obviate displacement of the printing-paper inthe frame each half of the back is provided with the pin or stop 11,against which the lower edges of the arms m boar when they are in theirlocked position. To facilitate fixing the back in position, one-half ofit is marked, as at 0, and this end is pressed firmly against asimilarly-marked end of the frame I). The springs orarmsmarethenturnedandfastened down over the back Z by the pivoted plates 19, theirlower edges bearing closely against the pins or stops it, so that nomovement, however slight, can take place when the paper is beinginspected during the course of printing.

The slots cl in the lugs 0 permit of the adjustment of the frames forvarying thicknesses of vignetting-cards and for the insertion of thefingers for manipulating the same.

Having now fully described the nature of our said invention, what weclaim, and desire to secure by Letters Patent, is

The improved vignetting attachment for photographic-printing framescomprising a frame a fitted with lugs 0 formed with slots (Z,thumb-screws e engaging with said slots for fixing the frame a to theprinLing-lrmne, and the light-diffuser h held in position by clips 1',jin combination with the printingframe Z) provided with strips fanclplates 9 formed with screw-holes, Lhe back Z, stop '11, marks 0, andpivoted plates p, substantially as described.

1 In Witness whereof We have hereunto set our hands in the presence oftwo Witnesses.

I WILLIAM ARMSTRONG.

I WILLIAM ROBERT OWEN CHAMBERS.

Vitnesses:

I ARCH ROXBURGH,

i Tnos. HENDERSON.

